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Author Topic:   4bar, biscuit vs spring pull bar
washeduptoo
Dirt Maniac

Total posts: 155
posted August 10, 2005 08:54 AM  
What is the choice of 4-bar cars, a biscuit or spring pull bar? Someone told me with a 4-bar you needed to use a spring pull bar, is this correct or is it driver preference? I've looked in the archieves and I really couldn't determine the popular choice or the pros or cons of each. Any information is appreciated. Thanks

Kromulous
Dirt Forum Champ
Total posts: 796
posted August 10, 2005 10:58 AM  
I believe spring pull bars are generally accepted to be better for a 4 bar car. I dont think you could ever get a bisquit bar to be stiff enough.

Although i have heard alot of guys have alot of success with that X-factor pull bar, and D&M advertises one as being the miracle cure.


msnead
Dirt Forum Racer

Total posts: 77
posted August 10, 2005 11:34 AM  
I know of 4 cars all by the same local builder that are running biscuit bars with a 4-bar rear suspension. They have won a lot of races at our track.

I am running a 4/Z on the DirtWorks car and wondered why DirtWorks uses the spring bar instead of biscuits.

I, personally, feel that we get more travel with our spring pull bar than the biscuit-only bars get but I could be wrong.

Any ideas?

locknload
Dirt Roller

Total posts: 13
posted August 10, 2005 12:13 PM  
We have a J-Car-4/z Lr Clamped in front, use a all-star triple biscuit pullbar (2 biscuits under load and 1 on deceleration). Works excellent!!! ton of forward bite on dry tracks. Gets up on the bars fast. We have not tried the spring pull bar yet, what we have works so good we are almost afraid to change it.

J 46
Dirt Full Roller

Total posts: 28
posted August 10, 2005 12:29 PM  
We just changed are car over to a biscuit pullbar and a pan hard bar and it is bad fast , good sidebite and great foward bite on slick tracks. The spring pullbar didn`t work well or the j bar for us .We run half mile tracks .

J 46

Kromulous
Dirt Forum Champ
Total posts: 796
posted August 10, 2005 01:44 PM  
Interesting, maybe i need to mess with a biscuit bar as well. Especially on the UMP tires.

msnead
Dirt Forum Racer

Total posts: 77
posted August 10, 2005 03:00 PM  
It seems to me that the biscuit bar requires a lot less maintenance...is this true?

The guy I help has never taken his apart... The forum says that we should disassemble the spring-style pull bar after every race.

Opinions???

washeduptoo
Dirt Maniac

Total posts: 155
posted August 10, 2005 03:23 PM  
We run the quick car type biscuit bar and have no problems with it, just someone who wins alot of local races who has almost the same rear suspension as we do told us the 4-bar needs the spring pull bar. The driver says we have good forward bite with the biscuit...so I don't know if we want to try it or not. Maybe we can borrow a spring pull bar and try it. What spring should we try? I believe local guy runs a 1000. Keep the input coming. Thanks

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted August 10, 2005 04:11 PM  
If you try the spring bar run somewhere around 1000 or 1050 spring. I run an Afco progressive spring bar and I like it, I had a biscuit bar on my other car but I can't really compare the 2 b/c my old car was a 3-link, and my new one is a 4-2. But I have had my spring bar bind up due to lack of maintainence. So yes you need to disassemble and clean the bar often. Like maybe every 5-10 races or so.

J 46
Dirt Full Roller

Total posts: 28
posted August 10, 2005 07:24 PM  
We tryed the afco spring pullbar and they will bind up if you don`t clean them after every couple of races , then went to a BSB pullbar works alot better far as binding . We have only run the biscuit a couple of times so far and it is the best thing we have found for are four bar car so far .

J 46

rrrrick
Dirt Maniac

Total posts: 192
posted August 11, 2005 03:28 PM  
maintaince is the key with every set-up, you need to change the bisquits every so ofetn to keep em working right.
my new car I run a sring pull bar and it has really good forward bite

J 46[/B][/QUOTE]


GRTmod
Dirt Full Roller

Total posts: 33
posted August 17, 2005 02:30 PM  
I've always ran a rubber on a four bar, i've tried the spring, but didnt like it. Now with a 4-2 i have the rubber in during the heat race and if the track dries out i put an Afco 2-way in. Seems to work.

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